[Swig-user] about enumeration

[Pascal <pas...@gm...>]

Hi,

I would like to understand if it is possible to do this kind of construction
with swig?

Let's have an enum where an entry is conditionned: AnEnum.h looks like

#ifndef ANENUM_H
#define ANENUM_H
enum AnEnum
{
EnumVal1_ENU,
EnumVal2_ENU,

#ifdef _WITH_EXTENSION_
Extension_ENU,
#endif

EnumValN_ENU

 };

#endif // ANENUM_H

To make it available in Python, the following Tools.i file was generated

%module Tools
%{
#include "AnEnum.h"
%}
%include "AnEnum.h"

The wrap file was generated using the following options:

swig.exe -c++ -python -D_WITH_EXTENSION_ -o Tools_wrap.cpp Tools.i

If the Tools module is imported in Python, the enumeration entries are
available

Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import Tools
>>> dir(Tools)
['EnumVal1_ENU', 'EnumVal2_ENU', 'EnumValN_ENU', 'Extension_ENU', '_Tools',
'__builtins__', '__doc__', '__file__', '__name__', '_newclass', '_object',
'_swig_getattr', '_
swig_repr', '_swig_setattr', '_swig_setattr_nondynamic', 'new',
'new_instancemethod']
>>>

At this level, it's OK.

But I would like to hide the Extension_ENU entry in another header file
let's call it ExtensionEnumEntries.h:

#ifndef EXTENSIONENUMENTRIES_H
#define EXTENSIONENUMENTRIES_H

Extension_ENU,

#endif // EXTENSIONENUMENTRIES_H

And change the AnEnum.h file into:

#ifndef ANENUM_H
#define ANENUM_H
enum AnEnum
{
EnumVal1_ENU,
EnumVal2_ENU,

#ifdef _WITH_EXTENSION_
#include "ExtensionEnumEntries.h"
#endif

EnumValN_ENU

};

#endif // ANENUM_H

In this case, the process that generates the wrap file complains

AnEnum.h: Error : Syntax error in input(1)

the line errror corresponds to the #include "ExtensionEnumEntries.h"
declaration.

And of course the "hidden" entry is not available in the module.

I am using SWIG Version 1.3.29.

I tried adding -includeall in the swig call but this does not change
anything.

Here is my question:

Can swig manage this kind of construction where information is "hidden" in
header files?

By the way, I would like also to use conditionnal inclusion of header file
to declare member functions in the declaration of classes.

Regards

Pascal